Drill press adaptor for mandrels



July 25, 1961 J. D. NOWELL DRILL PRESS ADAPTOR FOR MANDRELS Filed June.24, 1959 v 2 Sheets-Sheet 1 Rid JflMweZZ INVENTOR July 25, 1961 J. D. NOWELL DRILL PRESS ADAPTOR FOR MANDRELS Filed June 24, 1959 2 Sheets-Sheet 2 Q m w w Q i kl mm W I a U a Q Q a? N m h N n J DJV'oweZZ INVENTOR ATTORNEYS.

United States Patent 2,993,310 DRILL PRESS ADAPTOR FOR MANDRELS James D. Nowell, Lincolnton, NC. (343 Prince Court, Newton, N.C.) Filed June 24, 1959, Ser. No. 822,633 1 Claim. (Cl. SI-184.3)

This invention relates to a drill press adaptor for mandrels, and more particularly to an adaptor for that type of mandrel embodying a honing stone adapted to be secured and regulated by means of a tapered wedge slidmg in a groove.

A primary object of this invention is the provision of an improved adaptor of this character having means whereby the wedge of the mandrel may be moved vertically to vary the radial position of the face of the hone by means of a rotating nut carried by the adaptor.

An additional object of the invention is the provision of such a device wherein the hone may be regulated during operation of the device.

Still another object of the invention is the provision of such a device wherein the adaptor may be locked in a suitable position of adjustment to lock the mandrel in the desired position of adjustment.

Still another object of the invention is the provision of an adaptor of this character which is sturdy and durable in construction, reliable and efiicient in operation, and relatively simple and inexpensive to manufacture, assemble and utilize.

Still other objects reside in the combinations of ele ments, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawing wherein there is shown a preferred embodiment of this inventive concept.

In the drawings:

FIGURE 1 is a plan view of one form of adaptor embodying features of the instant invention shown in association with the hone.

FIGURE 2 is a side elevational view of the device of FIGURE 1.

FIGURE 3 is an enlarged sectional view taken substantially along the line 33 of FIGURE 1 as viewed in the direction indicated by the arrows.

FIGURE 4 is a sectional view taken substantially along the line 44 of FIGURE 3 as viewed in the direction indicated by the arrows.

FIGURE 5 is a sectional view taken substantially along the line 55 of FIGURE 3 as viewed in the direction indicated by the arrows.

FIGURE 6 is a sectional view taken substantially along the line 66 of FIGURE 1 as viewed in the direction indicated by the arrows.

FIGURE 7 is a fragmentary exploded side elevational view showing a portion of the adaptor, and its association with a component part of a movable wedge of the mandrel.

FIGURE 8 is an enlarged sectional View taken substantially along the line 88 of FIGURE 4 as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Having reference now to the drawings, the adaptor of the instant invention is generally indicated at 10, and is adapted to be employed with a hone generally indicated at 11. The hone 11 is of the so-called Sunnen type, and forms no part of the instant invention per se. The hone 11 includes an enlarged sleeve 12, having a central bore 13 therein, from which extends a shank 14, having a groove 15 therein. A bone 16 is adapted to be secured to the end of the shank 14, being secured in the groove in a known manner, and held in position by means of a wedge 17, which is adapted for longitudinal movement in the groove 16, and which by its degree of insertion towards the hone causes expansion or contraction of the hone surface.

The end of the wedge 17 includes, as best shown in FIGURE 7 a shank 19, which carries a hook shaped member 20, having an inwardly extending flange 21. Obviously linear movement of the flange 21 and its associated rod 19 will occasion movement of the wedge in order to govern the corresponding movement of the hone or honing stone.

A primary object of the instant adaptor is to provide a ready and expeditious means of moving the wedge in a simple manner, which movement may be accomplished during the use and operation of the hone.

The adaptor 10 of the instant invention includes a tubular socket 25, which is adapted to seat over the member 12, with a relatively tight friction fit for insuring engagement thereof. A threaded opening 26 in the wall of the socket 25 may be employed for the reception of a clamping or set screw to insure a relatively tight engagement of the component parts. The end of the socket 25 comprises a wall 27, from which projects a U-shaped member 28, including an outer wall 29 having a shank 30 integrally formed therewith and including a tip portion 31 adapted to be engaged by a drill press. A threaded bore 32 extends through the end wall 27, and also through the end 29 of the member 28 into a threaded bore 33 in the shank 30, and accommodates a screw 35, having an unthreaded end portion 36 with a groove 37 therein.

The screw 35 is also provided with a longitudinal groove 38 which communicates with the groove or channel 37. The unthreaded end portion of the screw 35 also includes a projection portion 40, which serves as a guide to prevent rotation of the screw by engagement of the partition 46, which is positioned interiorly of the hollow 13 in the adaptor of the mandrel.

A knurled nut 48 is mounted on the screw 35, in the U-shaped member 28, and threadedly engages the screw 35, in such manner that rotation of the nut 48 imparts linear movement to the screw 36, without rotation, in such manner that the flange 21 may be moved inwardly or outwardly by rotation of the knurled knob, to accordingly adjust the position of the wedge 17, and consequently of the honing stone 16.

Suitable openings 39 are formed in the periphery of the nut 48, for the reception of tools or the like, and a bore 50 is provided in the socket 25.

From the foregoing it will now be seen that there is herein provided an improved adaptor for mandrels which accomplishes all of the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiments herein before shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative, and not in a limiting sense.

What is claimed is:

A drill press adaptor for a wedge type mandrel, carrying a radially movable hone, wherein linear movement of a wedge varies the relative position of the hone and the wedge is provided with a tongue, said adaptor comprising a socket member adapted to be positioned over the end of the mandrel, a substantially U-shaped member formed integral with said socket member at one end thereof, said U-shaped member having a shank adapted.

for engagement by a drill press chuck, a screw extending through said U-shaped member into said socket and linearly movable therein, said screw having a transverse groove in the inner end thereof adapted to be engaged by said tongue, an exposed knurled nut mounted within said U-shaped member having threads in phase with the threads of said screw, imparting linear movement to said screw to vary the position of said tongue and hence said wedge, upon rotation of said nut.

UNITED STATES PATENTS Moser Nov. 18, 1930 Sunnen June 6, 1944 Hasty Apr. 15, 1947 Dow Sept. 11, 1956 FOREIGN PATENTS France Sept. 9, 1953 

